Latch.



J. M. HYDE.

LATCH.

APPLICATION FILED SEPT. 23. I916.

Patented Mar. 13, 1917.

2 SHEETS-SHEET 1- J. M. HYDE.

LATCH.

APPLICATION FILED SEPT. 23. 1916.

1,219,318. Patented'Mar. 13, 1917.

2 SHEETS-SHEET 2.

JAMES M. HYDE, OF SAPULPA, OKLAHOMA.

LATCH.

Specification of Letters Patent.

Patented Mar. 13, 1917.

Application filed September 23, 1916. Serial No. 121,782.

To all whom it may concern:

Be it known that 1, JAMES M. HYDE, a citizen of the United States, residing at Sapulpa, in the county of Greek and State of Oklahoma, have invented certain useful Improvements in Latches, of which the following is a specification, reference being had therein to the accompanying drawing.

The invention relates to looks and more particularly to the class of mortise looks or knob latches for doors or the like.

The primary object of the invention is the provision of a lock of this character wherein the construction thereof permits the mounting of the same within a door without weakening it and can be applied to one side thereof thereby eliminating the excessive cutting away of the door for accommodating the look as it requires the boring of only two holes for forming a seat for the casing of the lock.

Another object of the invention is the provision of a lock of this character wherein the latch constitutes the. locking bolt therefor and the same when thrown or in locking position will be held fast for the secure locking of a door or the like.

A further object of the invention is the provision of a look of this character wherein the construction thereof necessitates the assemblage of few parts which are arranged with respect to each other in a novel man ner so as to render the lock compact, and said parts being readily accessible yet the simplicity of the parts and the assemblage thereof eliminates any possibility of the lock becoming inoperative or ineffective for use.

A still further object of the invention is the provision of a lock of this character which is extremely simple in construction, thoroughly reliable and efficient in operation, strong, durable, readily and easily applied to and removed from a door or the like, and inexpensive in manufacture and installation.

With these and other objects in view the invention consists in the features of construction, combination of elements, and arrangement of parts as will be hereinafter fully described, illustrated in the accompanying drawings, and pointed out in the claims hereunto appended.

In the accompanying drawings:

Figure 1 is a fragmentary side elevation of a door frame and door showing the lock constructed in accordance with the invention applied.

Fig. 2 is a fragmentary edge elevation of the door with the lock thereon.

'Fig. 3 is a plan view of the lock casing.

Fig. at is a similar view with the cover plate removed.

Fig. 5 is a vertical longitudinal sectional view through the lock showing the latch bolt released.

Fig. 6 is a view similar to Fig. 5 showing the latch bolt locked.

Fig. 7 is a side elevation of the latch bolt.

Fig. 8 is a plan view thereof.

Similar reference characters indicate corresponding parts throughout the several views of the drawings.

Referring to the drawings in detail, A designates a portion of a door frame and B a portion of a swinging door which are of the usual well-known construction and upon this swinging door is mounted the look hereinafter fully described.

The lock comprises a casing 10 preferably in the shape of the numeral 8 and is fitted at one side thereof with a removable cover plate 11 provided with a key hole or slot 12 and likewise the back of the casing if formed with a companion hole 13 for the reception of the end of the shank of the key 14 when inserted within the hole or slot 19. for operating the lock mechanism hereinafter fully described.

The lock casing 10 with the cover plate 11 which latter is detachably fastened there to through the medium of screws 15 are placed within a suitable mortise formed within the door B and cut correspondingly to the shape of the lock casing 10 for the reception thereof.

Mounted within the free edge of the door B in a suitable counterseat is a front guide plate 16 formed with a guide thimble 17 for the latch bolt 18 which is adapted to engage in a suitable keeper mounted in the door frame A and this bolt is formed wit-h a reduced threaded stem 19 which works through a suitable opening in the edge wall of the lock, casing 10 and is detachably threaded in a lug 20 formed on the part 21 of the bolt and slidably fitted in a seat or guideway 22 formed in the bottom or rear wall of the lock casing 10. Passed transversely through the door, locking casing 10 and its cover 11 is a knob spindle which is also passed through escutcheon plates 21 fastened to opposite faces of the door at the point of the lock casing 10 therein and upon this spindle 23 at its ends there of are adjustably mounted door knobs 25 which permit the turning of the spindle for the operation of the latch bolt 18 in the manner presently described.

Carried on the spindle 23 is the hub 26 of a cam 27 which engages with an abutment or lug 28 on the inner end of the part 21 so that said part and the latch bolt 18 detachably connected thereto can be operated for the unlatching of the door on operating either of the knobs 25 upon the ends of the spindle 23 as will be apparent.

Arranged within the lock casing 10 in the guide way 29 formed therein is a sliding lock bolt 30 which is formed in one edge with spaced notches 31 in either of which is received a tooth 82 formed at one edge of the guide way 29 for the lock bolt 30 so as to hold the latter in its thrown position protruded into the run way or seat 22 for the part 21 or receded therefrom so that in this manner the said part will be held in its thrown position for holding that latch bolt 18 in looking position or said part 21 is free for retracting movement within the lock casing to permit the movement of the latch bolt 18 to unlocking position.

The key 14 when inserted within the lock casing 13 and turned will bring its bit 33 into engagement in a seat 3% formed in the lock bolt 30 sothat when the key is being turned the bolt will be moved to locking or unlocking position and 'also moved in the direction to free it from the tooth 32 prior to the sliding movement thereof by the action of the key.

Suitably mounted within the lock casing 10 and working against the lug 20 of the part 21 is a leaf spring 35 which automatically moves the tumbler in a direction to throw the latch bolt 18 into locking position. Also suitably mounted within the lock casing 10 is a second leaf spring 36 which plays upon the sliding lock bolt 30 to positively move the same into position for the engagement of the tooth 32 in either of the notches 81 in said locking bolt so that the latter will be held in its releasing or looking positions.

From the foregoing it is thought that the construction and manner of use of the latch will be clearly understood and therefore a more extended explanation has been omitted.

What is claimed is:

' 1. In a look, a casing having a removable cover plate and also provided with internal run and guide ways at right angles to each other, a part slidable within the runway and having a lug, a locking bolt detachably engaged in the lug, a sliding locking bolt in the guideway and movable into and out of the path of movement of said part, a spindle operated cam for action upon said part, a tooth formed in the guideway and engageable with the locking bolt to hold the same in adjusted position, and spring means acting upon said part and bolt.

2. In a look, a casing having a removable cover plate and also provided with internal run and guide ways at right angles to each other, a part slida-ble within the runway, a locking bolt detachably engaged in said part, a sliding locking bolt in the guideway and movable into and out of the path of movement of the part, a spindle operated cam for action upon the part, a tooth formed in the guideway and engageable with the locking bolt to hold the same in adjusted position, spring means acting upon said part and bolt, and a guide plate having a guide thimble for the latch bolt.

In testimony whereof I a'liix my signature.

JAMES M. HYDE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D G. 

